IPC aur BNS ke basics samajhne ke liye kya padhna padta hai?

Mujhe kafi confusion hui hai, maine ab tak Ratanlal and Dhirajlal ki book padhi hai, abhi to kuchh samajh gya hai, lekin fir se confuse ho jaata hu. Mere doston ne kaha hai ki Dr. A.V. Ellis ki book acchi hai, lekin maine abhi usse nahin padha hai. Maine online classes bhi seekhi hai, lekin kuchh baaton ko samajhne mein mushkil ho rahi hai. Main BNS aur IPC ka fundamental concept samajhna chahta hoon, koi book ya video recommendations chahiye jisse mujhe thoda relief mile?